Deep fakes—highly realistic and difficult-to-detect depictions of real people doing or saying things they never said or did—are a profoundly serious problem for democratic governments and the world order. A combination of technology, education, and public policy can reduce their effectiveness.

Advances in data science are already transforming the way energy is produced, transported and consumed. These innovations have the potential to reduce carbon emissions and boost clean energy, but they also come with serious risks.

A policy of combating kleptocracy across sub-Saharan Africa would strengthen the national security of the United States, and the Donald J. Trump administration should start with Nigeria and South Africa.